1. Broadband OFDM solution for Medium Voltage lines based
on IEEE and LOADng
A. Llano, D. Gil, J.A. Moreno, T. Arzuaga, E. Herbrich

2. Broadband OFDM solution for Medium Voltage lines based
on IEEE and LOADng
MV PLC Application
Communication system description
Test description and results
Conclusions

3. Medium Voltage PLC Application

4. Medium Voltage PLC Application

5. Medium Voltage PLC Application
Broadand PLC
Low Voltage
Narrowband PLC
In-Home PLC
Main userbase
Utilities
Final user
Distance requirements
8 km
2 km
100 m
Bandwidth
High (12 MHz)
Low (<500 KHz)
Very High (>50 MHz)
Throughput requirement
Medium
(100 Kbps – 10 Mbps)
Low
(<100 Kbps)
Very high
(>100Mbps)
Nodes in a network
(<20)
(>100)
Very low
(<5)
Redundancy requirement
Yes No
Noise sources
AM transmissions
End user devices

6. PHY Layer TX RX

7. PHY Layer Parameter Options Bandwidth Normal 6 MHz Reduced 1.5 MHz
Doubled
12 MHz
Constellation
QPSK
16QAM
Turbocode
Disabled
rate=1
Enabled
rate=1/3
Repetition
repetition=x1
repetition=x5

8. MAC Layer IEEE 802.15.4 Frame format Medium access Security
Device addressing
Automatic Packet Recovery
Modified for timming of the PHY

9. Dynamic Routing LOADng Automatic Path resolution
Dynamic + Decentralized  Redundancy
Plug and play

10. PHY Layer tests and results
Parameters
Mode 1
Mode 2
Mode 3
Mode 4
Throughput
9.6 Mbps
3.2 Mbps
0.64 Mbps
0.16 Mbps
Bandwidth
Normal (6 MHz)
Reduced (1.5 MHz)
Constellation
QPSK
Turbocoding
Disabled (rate=1)
Enabled (rate=1/3)
Repetition
Disabled (x1)
Enabled (x5)

11. PHY Layer tests and results
Link #
Distance
Link type
FER
Mode 1
Mode 2
Mode 3
Mode 4
Link 1
80 m
rural - underground
0.05
0.00
Link 2
152 m
0.09
Link 3
1282 m
0.34
Link 4
243 m
0.08
Link 5
506 m
Link 6
739 m
rural - aerial
1.00
0.85
Link 7
1404 m
0.20
Link 8
2704 m
Link 9
8000 m

12. MAC Layer tests and results
Test environment:
Underground environment
Real IP application data
Dynamic routing and modulation enabled
4 devices tested up to 3 hops repetition
Test results:
Full connectivity test: Success
Modulation scheme autodetection check: Success
Redundancy test: Success

13. Broadband OFDM solution for medium voltage lines based
on IEEE and LOADng
Modes selection: Turbocoding disabled not practical, new puncturing modes 8/9 and 3/4
More test required:
PHY layer: QAM, Turbocoding 8/9, 3/4 and 12 MHz channel
MAC layer: More devices (20 devices)
Promissing technology for MV applications:
Up to 38.4 Mbps and up to 8 Km at 160 Kbps.
Dynamic multihop routing with redundancy